One vertex per element, one color per generator, with an edge from x to x·s.
(2,3)(6,8)(9,10)(11,15)(12,13)(14,16)(17,18)(19,20)(21,22)(23,24) involution — undirected(9,11)(10,14)(12,15)(13,16)(17,19,23,22)(18,21,24,20)(1,2,4,3)(17,20,23,21)(18,19,24,22)(5,6)(7,8)(9,12,13,10)(11,15,16,14)(17,21,23,20)(18,19,24,22)(1,3,4,2)(9,11)(10,15)(12,14)(13,16)(17,22,23,19)(18,21,24,20)A Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.